JPH0517445Y2 - - Google Patents

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Publication number
JPH0517445Y2
JPH0517445Y2 JP1987094013U JP9401387U JPH0517445Y2 JP H0517445 Y2 JPH0517445 Y2 JP H0517445Y2 JP 1987094013 U JP1987094013 U JP 1987094013U JP 9401387 U JP9401387 U JP 9401387U JP H0517445 Y2 JPH0517445 Y2 JP H0517445Y2
Authority
JP
Japan
Prior art keywords
grease
bearing
lubrication
steel balls
outer ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP1987094013U
Other languages
Japanese (ja)
Other versions
JPS64718U (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1987094013U priority Critical patent/JPH0517445Y2/ja
Publication of JPS64718U publication Critical patent/JPS64718U/ja
Application granted granted Critical
Publication of JPH0517445Y2 publication Critical patent/JPH0517445Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6677—Details of supply of the liquid to the bearing, e.g. passages or nozzles from radial inside, e.g. via a passage through the shaft and/or inner ring

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Description

【考案の詳細な説明】[Detailed explanation of the idea] 【産業上の利用分野】[Industrial application field]

この考案は、工作機械の主軸等、高精度、高速
回転で使用され、グリース潤滑されるアンギユラ
玉軸受に関する。 This invention relates to angular contact ball bearings that are used in high-precision, high-speed rotation, such as main shafts of machine tools, and are lubricated with grease.

【従来技術およびその問題点】[Prior art and its problems]

従来、工作機械の主軸等に使用されている軸受
には第４図に例示するような複式スラストアンギ
ユラ玉軸受がある。 この軸受は、外輪１と一対の内輪２と、複列の
鋼球３と、一対の保持器４、及び予圧調整間座５
からなり、外輪１の中央に穿設されたグリース補
給孔１′から供給されるグリースにより潤滑され
ている。 この種の軸受に於いては、高速で低温度上昇で
あることが必須条件である為、グリース量を減ら
して低温度上昇化が図られているが、空間容積が
小さく、グリースの保有性が劣る為、高速になつ
た場合、グリース不足により安定した潤滑条件を
維持することが困難で焼付き等を生じる問題があ
つた。 BACKGROUND OF THE INVENTION Bearings conventionally used for main shafts of machine tools include double thrust angular ball bearings as illustrated in FIG. This bearing includes an outer ring 1, a pair of inner rings 2, double row steel balls 3, a pair of cages 4, and a preload adjustment spacer 5.
The outer ring 1 is lubricated with grease supplied from a grease supply hole 1' formed in the center of the outer ring 1. For this type of bearing, high speed and low temperature rise are essential conditions, so attempts are made to reduce the amount of grease to lower the temperature rise, but the space volume is small and the ability to retain grease is poor. Therefore, when high speeds were reached, it was difficult to maintain stable lubrication conditions due to lack of grease, causing problems such as seizure.

【問題点を解決するための手段】[Means to solve the problem]

この考案は上記焼付き等の問題点を解決し、グ
リースの供給を極く微小量ずつ長期に亘つて連続
的に行なう為に、保持器の環状基部内径面にグリ
ース保有用周溝を形成すると共に、該周溝と鋼球
保持用ポケツトとの間にグリースを遠心力を利用
して流出させる径方向の潤滑用大径孔と、潤滑用
小径孔を夫々円周等配置で設けた構成とした。 This idea solves the above-mentioned problems such as seizure, and in order to continuously supply grease in very small amounts over a long period of time, a circumferential groove for retaining grease is formed on the inner diameter surface of the annular base of the cage. In addition, a large diameter hole for lubrication in the radial direction and a small diameter hole for lubrication are provided at equal circumferential locations between the circumferential groove and the steel ball holding pocket, through which grease flows out using centrifugal force. did.

【作用】[Effect]

潤滑グリースは保持器の環状基部内径面に形成
された周溝内に充填され、大径孔からは遠心力を
利用して初期に鋼球及び転走面に流出して潤滑膜
を形成し、小径孔からは遠心力と軸受温度上昇の
効果により、グリース中の基油が流出して上記潤
滑膜層に供給され、極く微小量ずつ長期に亘つて
連続的に流量の制御を行いながら供給する。 The lubricating grease is filled in the circumferential groove formed on the inner diameter surface of the annular base of the cage, and from the large diameter hole, it initially flows out onto the steel balls and raceway surface using centrifugal force, forming a lubricating film. Due to the effect of centrifugal force and rise in bearing temperature, the base oil in the grease flows out from the small diameter hole and is supplied to the above lubricating film layer, continuously controlling the flow rate over a long period of time in extremely small amounts. do.

【実施例】【Example】

以下、この考案の実施例を第１図乃至第３図に
従つて詳細に説明する。 第１図は本考案に係るアンギユラ玉軸受の要部
断面図である。 尚、同一部分には同一符号を記してその説明を
省略する。外輪１と内輪２との空隙に収容されて
いる鋼球３は、保持器４の環状基部６から斜め外
方に突設された柱部７間のポケツト８内で回転自
在に保持されている。この保持器４の環状基部６
の内径面には断面半円状の周溝９が形成され潤滑
グリースを保持する。この周溝９からポケツト８
の略中央部に連通する大径孔１０と小径孔１１を
夫々円周等配置に第２図のように穿設する。これ
はグリース供給量が円周方向でアンバランスにな
らない為であり、各個数及び孔径は軸受の使用条
件等によつて適宜決定される。 複式スラストアンギユラ玉軸受（内径100mm）
を供試体として、本考案の軸受と従来軸受を回転
数3700rpmで運転した時の外輪外径部の温度上昇
（軸受温度−雰囲気温度）を比較したものを第３
図に示す。本考案の軸受は安定した立上がりでピ
ークは認められず、20時間経過時の温度上昇（平
衡温度）12deg.は略３時間の運転で得られる。一
方、従来軸受の場合グリース潤滑に於いてよく発
生する運転初期のピークが認められ、その後も不
安定で、20時間経過時の温度上昇は13.5deg.で本
考案の軸受より1.5deg.高い値を示している。又
正逆急加減速という苛酷な条件で実施した耐久試
験では、従来軸受の５倍以上の耐久性を有してい
た。（表参照） Hereinafter, embodiments of this invention will be described in detail with reference to FIGS. 1 to 3. FIG. 1 is a sectional view of a main part of an angular contact ball bearing according to the present invention. Incidentally, the same parts are denoted by the same reference numerals and the explanation thereof will be omitted. A steel ball 3 accommodated in the gap between the outer ring 1 and the inner ring 2 is rotatably held in a pocket 8 between pillars 7 that project obliquely outward from an annular base 6 of the cage 4. . An annular base 6 of this retainer 4
A circumferential groove 9 having a semicircular cross section is formed on the inner diameter surface of the lubricant to hold lubricating grease. Pocket 8 from this circumferential groove 9
Large-diameter holes 10 and small-diameter holes 11 communicating with approximately the center of the tube are bored at equal positions around the circumference as shown in FIG. This is to prevent the amount of grease supplied from becoming unbalanced in the circumferential direction, and the number and diameter of each hole are appropriately determined depending on the usage conditions of the bearing. Double thrust angular ball bearing (inner diameter 100mm)
As a test specimen, the temperature rise (bearing temperature - ambient temperature) of the outer ring outer diameter when the bearing of the present invention and the conventional bearing were operated at a rotation speed of 3700 rpm was compared.
As shown in the figure. The bearing of the present invention has a stable start-up with no peak observed, and a temperature increase of 12 degrees (equilibrium temperature) after 20 hours can be obtained after approximately 3 hours of operation. On the other hand, in the case of conventional bearings, a peak at the beginning of operation, which often occurs with grease lubrication, was observed, and it remained unstable after that, and the temperature rise after 20 hours was 13.5 degrees, which is 1.5 degrees higher than that of the bearing of the present invention. It shows. Furthermore, in a durability test conducted under severe conditions of sudden acceleration and deceleration in forward and reverse directions, it was found to have more than five times the durability of conventional bearings. (See table)

【表】 潤滑グリースの供給孔 大径孔 φ2 小径孔 φ0.5 潤滑性能を向上させるには供給孔の径を大きく
して、初期に流出したグリースで鋼球及び転走面
に潤滑膜を形成させることが必要であるが、単に
大きくするだけでは供給孔の周囲のグリースが初
期に出つくして、継続して供給することができな
いという問題があり、小径の供給孔を継続潤滑用
として配設すると、軸受の温度上昇により分離し
た基油が適量遠心力により流出し、初期の潤滑膜
をバツクアツプして長期に亘つて軸受の潤滑に寄
与する。従つて、グリースの攪拌熱の影響を軽減
すると共に、グリース切れによる軸受の焼付きを
防止して長寿命化を図ることができる。[Table] Lubricating grease supply holes Large diameter hole φ2 Small diameter hole φ0.5 To improve lubrication performance, increase the diameter of the supply hole, and form a lubricating film on the steel balls and raceway surfaces with the grease that initially flows out. However, simply increasing the size of the supply hole causes the problem that the grease around the supply hole runs out at an early stage and it is not possible to supply the grease continuously, so a small diameter supply hole is installed for continuous lubrication. Then, an appropriate amount of the base oil separated by the rise in temperature of the bearing flows out due to centrifugal force, backs up the initial lubricant film, and contributes to the lubrication of the bearing over a long period of time. Therefore, the influence of the heat of stirring the grease can be reduced, and the bearing can be prevented from seizing due to running out of grease, thereby extending the life of the bearing.

【効果】【effect】

本考案の軸受は以上のような構成にしたので、
次に挙げる効果を有する。 大径の供給孔から遠心力による流出するグリ
ースで軸受の初期の潤滑膜を形成するのでグリ
ース充填が簡単で、馴し運転が不要である。 小径の供給孔から流出するグリースの基油に
より上記初期の潤滑膜をバツクアツプする為、
グリースの攪拌熱の影響を軽減し、軸受の温度
上昇を軽減し、長期に亘つて安定した潤滑が可
能である。 潤滑グリースの補給が不要で、メンテナンス
の容易な長寿命軸受を提供できる。 Since the bearing of this invention has the above structure,
It has the following effects. Grease flows out from the large-diameter supply hole due to centrifugal force and forms an initial lubricating film on the bearing, making filling with grease easy and eliminating the need for break-in. In order to back up the initial lubricant film mentioned above with the base oil of the grease flowing out from the small diameter supply hole,
It reduces the influence of the heat of stirring the grease, reduces the temperature rise of the bearing, and enables stable lubrication over a long period of time. It is possible to provide a long-life bearing that does not require replenishment of lubricating grease and is easy to maintain.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係るアンギユラ玉軸受の要部
断面図、第２図はグリース供給孔の配置を示した
模式図、第３図は本考案の軸受と従来の軸受との
温度上昇比較をした試験結果を示すグラフ、第４
図は従来の軸受を示す断面図である。 １……外輪、２……内輪、３……鋼球、４……
保持器、６……環状基部、８……ポケツト、９…
…周溝、１０……大径孔、１１……小径孔。 Figure 1 is a sectional view of the main parts of the angular ball bearing according to the present invention, Figure 2 is a schematic diagram showing the arrangement of grease supply holes, and Figure 3 is a comparison of temperature rise between the bearing of the present invention and a conventional bearing. Graph showing the test results, Part 4
The figure is a sectional view showing a conventional bearing. 1...Outer ring, 2...Inner ring, 3...Steel ball, 4...
Retainer, 6... Annular base, 8... Pocket, 9...
...Peripheral groove, 10...Large diameter hole, 11...Small diameter hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 内輪、外輪、内輪と外輪との間に収容される鋼
球及びこの鋼球及びこの鋼球を案内保持する保持
器とからなるスラストアンギユラ玉軸受におい
て、上記保持器の環状基部内径面にグリース保有
用周溝を形成すると共に、該周溝と鋼球保持用ポ
ケツトとの間にグリースを遠心力を利用して流出
させる径方向の潤滑用大径孔と、潤滑用小径孔を
夫々円周等配置で設けたことを特徴とする自己潤
滑能力を有するスラストアンギユラ玉軸受。 In a thrust angular ball bearing consisting of an inner ring, an outer ring, steel balls housed between the inner ring and the outer ring, and a cage that guides and holds the steel balls and the steel balls, grease is applied to the inner diameter surface of the annular base of the cage. In addition to forming a retaining circumferential groove, a large diameter hole for lubrication in the radial direction and a small diameter hole for lubrication are formed in the circumferential direction to allow grease to flow out using centrifugal force between the circumferential groove and the steel ball holding pocket. A thrust angular ball bearing having a self-lubricating ability characterized by being provided in an equal arrangement.
JP1987094013U 1987-06-18 1987-06-18 Expired - Lifetime JPH0517445Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987094013U JPH0517445Y2 (en) 1987-06-18 1987-06-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987094013U JPH0517445Y2 (en) 1987-06-18 1987-06-18

Publications (2)

Publication Number Publication Date
JPS64718U JPS64718U (en) 1989-01-05
JPH0517445Y2 true JPH0517445Y2 (en) 1993-05-11

Family

ID=30957079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987094013U Expired - Lifetime JPH0517445Y2 (en) 1987-06-18 1987-06-18

Country Status (1)

Country Link
JP (1) JPH0517445Y2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5775227U (en) * 1980-10-24 1982-05-10
JPS5970929U (en) * 1982-11-02 1984-05-14 三菱電機株式会社 rolling bearing

Also Published As

Publication number Publication date
JPS64718U (en) 1989-01-05

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